Answer :
Work in process balance = [Beginning balance + Materials requisitioned + Direct labor cost] - Cost of Job 39 - Cost of Job 40Cost of Job 39 = Materials cost + Direct labor cost + Overhead cost = $17,700 + $8,800 + ($40 x $8,800 x 120%) = $17,700 + $10,560 = $28,260.
The cost of goods sold for June is $32,499.4. Price charged for Job 39 = Cost of Job 39 x 1.15 = $28,260 x 1.15 = $32,499.The price charged for Job 39 is $32,499. Process costing Overhead rate = Actual overhead cost / Actual direct labor hours= $50,367 / 6,180 hours= $8.15 per hour.
Cost = Direct materials + Direct labor cost + Overhead cost= $3,450 + ($11 x 30) + ($8.15 x 30)= $3,450 + $330 + $244.50= $4,024.50Therefore, the cost of an installation that takes $3,450 of direct materials and 30 direct labor hours is $4,024.50.
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